article: Hello! My name is Zhang Fei. I am Chinese. I am twelve. I'm in No.1 Middle School in Nanjing. This is my friend. His name is Tony Green. He is an English boy .He is twelve. He and I are in the same  class. Our classroom is next to  the teachers' office .We have Chinese and English lessons  every day. Our English teacher is Mr. Read. He is English but he can speak Chinese. Our Chinese teacher is Mr. Ding. They are good teachers, and they are our friends, too
question: Mr. Ding is a teacher of(......)  _  .
options: English Chinese a high school an English school